A nurse is caring for a client who is receiving oxygen at 2 L/min via a nasal cannula. The nurse recognizes the client is receiving which of the following inspired oxygen concentration?
36%
70%
50%
28%
The Correct Answer is D
D. 28%:
When a client receives oxygen via a nasal cannula at a flow rate of 2 L/min, the approximate inspired oxygen concentration is around 24-28%. This is because each liter of oxygen delivered through a nasal cannula adds approximately 4% to the baseline room air concentration of 21%. Therefore, at 2 L/min, the client would be receiving approximately 24-28% inspired oxygen concentration.
A. 36%, B. 70%, C. 50%:
These percentages are not consistent with the oxygen concentration delivered via a nasal cannula at 2 L/min. Higher flow rates or alternative oxygen delivery systems, such as masks or high-flow nasal cannula, would be needed to achieve these concentrations.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Chocolate milk:
Chocolate contains caffeine, which can contribute to sleep disturbances. It is not a recommended beverage for someone looking to decrease caffeine intake.
B. Diet cola:
Cola contains caffeine, even in diet versions, which can contribute to sleep disturbances. Therefore, it is not suitable for decreasing caffeine intake.
C. Brewed iced tea:
Brewed iced tea contains caffeine, which can interfere with sleep. It is not a suitable option for someone trying to reduce caffeine consumption.
D. Lemon-lime soda:
Lemon-lime sodas typically do not contain caffeine, making them a better choice for someone looking to reduce their caffeine intake and improve sleep.
Correct Answer is B
Explanation
A) The client with end-stage renal failure scheduled for dialysis is at risk for fluid volume excess rather than deficit. Dialysis is a treatment to remove excess fluid and waste products from the body, which can lead to fluid volume deficit if not managed appropriately, but the scenario does not indicate current dehydration.
B) The client with gastroenteritis and fever is at risk for fluid volume deficit due to fluid loss from vomiting, diarrhea, and fever-induced diaphoresis. Gastroenteritis commonly leads to dehydration, especially when accompanied by fever, which increases fluid loss through sweating.
C) The client with left-sided heart failure and an elevated brain natriuretic peptide (BNP) level is at risk for fluid volume excess rather than deficit. Elevated BNP levels indicate heart failure, which can result in fluid retention and volume overload rather than deficit.
D) The client who has been NPO since midnight for endoscopy is at risk for fluid volume deficit due to fasting. However, the severity and duration of fasting are not specified in the scenario, so it may not present an immediate risk compared to the client with gastroenteritis and fever.
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